Bookbinding machine and method



Jan. 15, 1935. L. c. MARTIN 1,988,208

BOOKBINDING MACHINE AN'D METHOD Filed April 16, 1934 Patented Jan. 15,1935 UNITED STATES 1.988.208 y nooxmnmc MACHINE AND ME'rnoD Laurance C.Martin, Chicago, Ill., assignor to Martin Machinery Corporation, NewYork,

Y., a corporation of New York Application April 16, 1934, ySerial No.720,902

4Claims.

This invention relates to improvements in bookbinding machines andmethod of bookbinding and is more especially applicable to that form ofbinding, accomplished without stitching or 5 stapling, where a pluralityof sheets have their edges glued together.

In this form of binding, a plurality of sheets are clamped together, theedges to be bound are trimmed and then roughened, and the glue is thenapplied. In the practice of this method, however, in the past, twodiiliculties have been encountered. In the first place, the rougheningmeans, usually a saw, in performing its work, leaves some dust on theedges of the sheets. This dust has interfered with the properapplication of the glue. In the second place, it has been found dimcultor impossible to secure the proper penetration of the glue between' thesheets. A thin glue is ordinarily used to hold the sheets together andto do this it ought to penetrate between the sheets for a short distancefrom the edges. The sheets have to be clamped together rather securely,however, and this clamping has prevented the proper penetration oftheglue.

By the practice of my invention, both of the objections mentioned abovearelessened or eliminated. I provide means for effectively removing thedust left by the roughening means. In general, this in'cludes a suctionnozzle following the roughening means. I also contemplate placing thesuction nozzle just ahead of the glue applicator. I believe that if thisis done, there may be temporarily created a reduced pressure between thesheets for a short distance from the edges. With a proper speed then,the sheets may be moved to the glue applicator so that re-entry of airfollowing the suction means will cause the glue to penetrate properlybetween the sheets.

Other features and advantages of my invention will appear more fully asI proceed with my specivIcation.

In that form of device embodying the features of my invention shown inthe accompanying drawing- Figure l is a view taken as indicated by theline 1 of Fig. 2; and Fig. 2 is a view in side elevation.

As shown in the drawing, A, B and C indicate groups of sheets to bebound into books. The sheets of each group are held together by suitableclamp members, the details of the necessary clamping mechanism not beingshown. Suitable means, well known in the art, are provided for moving orfeeding the groups of sheets, at the required speed, in the directionindicated by the arrow, so that they will pass in sequence over thecutter or trimmer, roughening device, suction means, and glueapplicator.

The cutter or trimmer is here shown as a circular knife indicated by 11.

l'I'he roughening device is a circular saw 12, the upwardly pointingteeth 12l of which engage the edges of the sheets to roughen them sothat the glue will adhere better.

'Ihe suction means is indicated by 13. This may be a suction nozzlesimilar to that used on a suction or vacuum cleaner. The mouth of thenozzle may be provided with a sliding orice plate 14 so that theeffective opening ofthe nozzle may be adjusted to t books or groups ofsheets of different thicknesses. It is to be understood that suitablemeans (not shown) are providedk for exhausting air from the nozzle inthe direction indit cated by the arrows to give the requisite lowpressure or vsuction in the nozzle. As stated in the fore part of thespecication, this nozzle removes the dust left on the edges of thesheets by the saw 12, and possibly may aid the penetration of the glueby temporarily reducing the air pressure between the sheets adjacenttheir edges.

Immediately following the suction nozzle is the glue applicator, hereshown as a rotating drum 15 dipping into the glue container 16 holdingthe liquid glue 17. The upper edge of the drum applies glue to the edgesof the sheets. 18 is a scraper to remove excess glue from the drum.

While I have shown and described certain embodiments of my invention, itis to be understood that it is capable of many modifications. Changes,therefore, in the construction and arrangement may be made withoutdeparting from the spirit and scope of the invention as disclosed in theappended claims, in which it is my intention to claim all noveltyinherent in my invention, as broadly as permissible, in view of theprior art. A

What I claim as new, and desire to secure by Letters Patent, is: e

1. A bookbinding machine, including; means for clamping a plurality ofsheets; means for roughening the edges to be bound; suction means forremoving the dust left by such roughening means; and means for applyingglue to the edges.

2. A bookbinding machine, including; meansv for clamping a plurality ofsheets; means for roughening the edges to be bound; suction means forremoving the dust left by such roughening means; and means for applyingglue to the edges vso immediately after the operation of the suction 55means, whereby reentry of sir between thel sheets aids the penetrationoi' the slue.

3. The method oi binding books, `comprising: clamping the sheets:rougheninz the edges to be 5 bound; removing the dust (left by theroughening means) by suction means; and applying glue. 4. The method oibinding books, comprising;

:,ossms clampinsthesheets: Nutheninzthe edzestobebound; removing thedust (left by the roughen- 'ing means) by motion means; and immediatelythereafter applying glue so that re-entry of air between the sheets willsid the penetration ot the s ue.

LAURANCE C. MARTIN.

